key_level_alerts_lib

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Library "key_level_alerts_lib"

shouldFireAlertAbove(level, acceptableRange, filterEnabled)
  Detects if price crossed above and closed above a level on this bar
  Parameters:
    level (float): The price level to check for cross
    acceptableRange (float): The maximum distance from level for close to be considered valid (used when filterEnabled=true)
    filterEnabled (bool): When true, checks that close is within acceptable range above level
  Returns: true if price crossed and closed above the level (optionally within acceptable range)
Detection logic:
Condition A: Opened below level AND closed above level (direct cross up)
Condition B: Opened above level, low touched/dipped to level (low <= level), closed above level

shouldFireAlertBelow(level, acceptableRange, filterEnabled)
  Detects if price crossed below and closed below a level on this bar
  Parameters:
    level (float): The price level to check for cross
    acceptableRange (float): The maximum distance from level for close to be considered valid (used when filterEnabled=true)
    filterEnabled (bool): When true, checks that close is within acceptable range below level
  Returns: true if price crossed and closed below the level (optionally within acceptable range)
Detection logic:
Condition A: Opened above level AND closed below level (direct cross down)
Condition B: Opened below level, high touched/spiked to level (high >= level), closed below level

processAlertAbove(level, acceptableRange, currentState, alertEnabled, filterEnabled)
  Process "crossed above" alert for a level - fires alert if transitioning from below/unknown to above
  Parameters:
    level (float): The price level to check
    acceptableRange (float): The acceptable range threshold for filtering
    currentState (int): Current alert state (-1=below, 0=unknown, 1=above)
    alertEnabled (bool): Whether the alert is enabled
    filterEnabled (bool): Whether to apply acceptable range filtering
  Returns: [newState, shouldFire] tuple where newState is updated alert state and shouldFire indicates if alert should trigger
State behavior:
- Alert fires when: state was -1 or 0 AND cross above detected AND alert enabled
- State updates to 1 (above) on any cross above
- State updates to -1 (below) on any cross below (resets for next above alert)

processAlertBelow(level, acceptableRange, currentState, alertEnabled, filterEnabled)
  Process "crossed below" alert for a level - fires alert if transitioning from above/unknown to below
  Parameters:
    level (float): The price level to check
    acceptableRange (float): The acceptable range threshold for filtering
    currentState (int): Current alert state (-1=below, 0=unknown, 1=above)
    alertEnabled (bool): Whether the alert is enabled
    filterEnabled (bool): Whether to apply acceptable range filtering
  Returns: [newState, shouldFire] tuple where newState is updated alert state and shouldFire indicates if alert should trigger
State behavior:
- Alert fires when: state was 1 or 0 AND cross below detected AND alert enabled
- State updates to -1 (below) on any cross below
- State updates to 1 (above) on any cross above (resets for next below alert)

calculateAcceptableRange(atrValue, acceptableRangePct)
  Calculates the acceptable range threshold for alert filtering based on ATR
  Parameters:
    atrValue (float): The daily ATR value
    acceptableRangePct (float): The acceptable range percentage (e.g., 85 for 85%)
  Returns: The acceptable range threshold in price units
Calculation: oneFullLevel = ATR × 0.24 (24% of daily ATR = one standard key level spacing)
acceptableRange = (acceptableRangePct / 100) × oneFullLevel

getAlertLabelTextSize(sizeStr)
  Converts a size string to Pine Script size constant for labels
  Parameters:
    sizeStr (string): The size string ("tiny", "small", "normal", "large", "huge")
  Returns: The corresponding Pine Script size constant

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v3